public function testMissingSetNoAndSeqNo()
{
$product = new Product();
$track11 = new Track();
$product->addTrack($track11);
$track12 = new Track();
$track12->setSetNo(1);
$track12->setSeqNo(2);
$product->addTrack($track12);
$position = new TrackPosition($product);
$this->assertEquals(1, $position->getPosition($track11));
$this->assertEquals(1, $position->getPosition($track12));
}
